A mine-used electro-hydraulic controlled reversing valve

Abstract

The present invention relates to the field of coal mine mechanical reversing valves, and specifically to an electro-hydraulic controlled reversing valve for mining, including a valve seat, in which a regulating component, a driving component, a lubrication component and a pressure relief component are respectively arranged; a plurality of servo drivers are installed above the valve seat, and a servo controller is installed on one side of each servo driver, and the servo controller is used to be linearly connected with a control system. A pressure relief path is ensured to avoid pressure increase and damage to internal parts, and the left and right movement of the valve core tube is used to squeeze the sealing cylinder so that the hydraulic oil flows into the threaded groove, thereby lubricating and maintaining the valve core tube. In this way, different pressure control can be met during hydraulic oil reversal, and adaptive pressure relief and lubrication and maintenance of the internal parts as a whole can be performed, thereby increasing the service life of the internal parts.

Description

Technical Field

[0001] The invention relates to the field of coal mine mechanical reversing valves, and in particular to an electro-hydraulic controlled reversing valve for mines. Background Art

[0002] Coal mining machinery reversing valve refers to the hydraulic reversing valve that controls the operation of other hydraulic components in coal mining machinery. It completes various actions by controlling the movement direction and speed of components such as the traveling mechanism, supporting mechanism, and cutting mechanism of the coal mining machine. It is a directional control valve with more than two oil ports, which can realize the communication, cutting and reversing of hydraulic oil flow, as well as pressure unloading and sequential action control.

[0003] The Chinese patent application with announcement number CN208417118U discloses a reversing valve, including a reversing valve seat, a reversing valve body and a reversing valve core. The reversing valve body is provided with a cavity for accommodating the reversing valve core. The reversing valve body is fixed on the reversing valve seat. The reversing valve core is provided in the cavity. The inner wall of the cavity and the outer wall of the reversing valve core are provided with honing patterns that match each other. The advantages of the utility model are: the cavity and the reversing valve core are matched to produce a mesh pattern by honing the inner hole. When the oil temperature heats up during the operation of the automobile, the piston will not get stuck, thus ensuring the product life.

[0004] During the use of the existing reversing valve, since the hydraulic oil will have a certain pressure during the driving process, and this hydraulic pressure varies, when the pressure is relatively high, it may damage the precision parts inside the reversing valve, and when working under high pressure for a long time, it is easy to shorten the service life of the internal parts. In addition, since the existing reversing valve has a sealed structure inside, a certain amount of friction will be generated when the internal parts are running. Due to the sealing reason, the internal parts cannot be lubricated and maintained in time, thereby affecting the normal use of the internal parts.

[0005] Therefore, it is necessary to invent a mining electro-hydraulic controlled reversing valve to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide an electro-hydraulic controlled reversing valve for mining. By moving the valve core tube left and right, the holes in the valve core tube and the diversion pipeline can be staggered, so that when each group of holes is output, at least one group of holes is guaranteed to be in a pressure relief position, thereby avoiding damage to internal parts due to high pressure, and by moving the valve core tube, the sealing cylinder is squeezed, so that the hydraulic oil flows into the threaded groove, thereby achieving the effect of lubrication and maintenance, so as to solve the problem that the reversing valve in the prior art has no pressure relief structure and is inconvenient to maintain and lubricate, thereby reducing the service life of the reversing valve.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: a mining electro-hydraulic controlled reversing valve, comprising a valve seat, a plurality of servo drivers are installed above the valve seat, a servo controller is installed on one side of each servo driver, and the servo controller is used to be linearly connected with a control system;

[0008] The regulating component arranged in the valve seat includes a cavity, a liquid inlet pipeline is opened above the inner wall of the cavity, a liquid outlet pipeline 1 is opened below the inner wall of the cavity, a liquid outlet pipeline 2 is opened below the inner wall of the cavity, and the liquid outlet pipeline 2 is symmetrically arranged with the liquid outlet pipeline 1;

[0009] The driving assembly disposed in the valve seat includes a docking cavity, and the docking cavity is symmetrically opened on the inner wall of the cavity;

[0010] The lubrication assembly disposed in the valve seat includes a delivery pipeline, the delivery pipeline is opened on one side of the valve seat, and a nut is threadedly connected at the opening of the delivery pipeline;

[0011] The pressure relief component arranged in the valve seat includes a pressure relief pipeline 1, which is opened below the inner wall of the cavity and is connected to the inside of the liquid outlet pipeline 2 through-through.

[0012] As a preferred solution of the present invention, the driving assembly also includes a butt joint pipe, which is installed at the through connection between the liquid inlet pipeline and the cavity, a valve core tube is through-connected in the cavity, a liquid inlet groove is provided above the valve core tube, a limiting groove is provided on the inner wall of the liquid inlet groove, and the inside of the limiting groove is slidably connected to the lower edge of the butt joint pipe.

[0013] As a preferred solution of the present invention, a liquid outlet hole 1 is opened at the bottom of the valve core tube, a liquid outlet hole 2 is opened at the bottom of the valve core tube, and liquid outlet hole 2 is located on one side of liquid outlet hole 1, and the aperture of liquid outlet hole 1 is larger than the aperture of liquid outlet hole 2, and the combination of liquid outlet hole 1 and liquid outlet hole 2 is symmetrically arranged in two groups at the bottom of the valve core tube, and a threaded groove is opened on the part of the valve core tube located inside the two groups of docking cavities.

[0014] As a preferred solution of the present invention, the lubrication component also includes a liquid storage cavity, which is opened inside the valve seat and communicated with the delivery pipeline. Lubrication pipelines are symmetrically opened below the liquid storage cavity, and connecting cavities are opened at the upper edges of the inner walls of the two groups of docking cavities, and the connecting cavities are communicated with the corresponding lubrication pipelines.

[0015] As a preferred solution of the present invention, a retaining ring is installed inside the connecting cavity, a sealing cylinder is connected through the connecting cavity, and the sealing cylinder is fitted with the bottom of the connecting cavity, a plurality of through holes are arranged in a ring-shaped pattern on the inner wall of the sealing cylinder, a limiting ring is sleeved on the sealing cylinder, a spring 1 is sleeved on the sealing cylinder, and the upper and lower sides of the spring 1 are respectively fitted with the limiting ring and the retaining ring.

[0016] As a preferred solution of the present invention, the drive assembly also includes a control chamber, which is opened on the inner wall of a group of docking chambers, and an internal threaded barrel is rotatably connected to the inner wall of the control chamber, a screw is threaded in the internal threaded barrel, and the screw is fixedly connected to one side of the valve core tube, a bevel gear 1 is sleeved and fixed on the internal threaded barrel, a bevel gear 2 is meshed on one side of the bevel gear 1, and the bevel gear 2 is axially connected to the output end of the servo driver.

[0017] As a preferred embodiment of the present invention, the pressure relief component also includes a second pressure relief pipeline, which is opened below the inner wall of the cavity, and is connected to the inside of the second liquid outlet pipeline, and is located on the side close to the opposite liquid outlet hole one, a third pressure relief pipeline is opened below the inner wall of the cavity, and is connected to the first liquid outlet pipeline, and is symmetrically arranged with the second pressure relief pipeline, and a fourth pressure relief pipeline is opened below the inner wall of the cavity, and is symmetrically arranged with the first pressure relief pipeline.

[0018] As a preferred solution of the present invention, an inner conical ring is installed on the inner wall of the pressure relief pipeline one, and the opening direction of the inner conical ring is toward the inside of the pressure relief pipeline one, and the inner conical ring is arranged in the pressure relief pipeline two, the pressure relief pipeline three and the pressure relief pipeline four. A baffle is installed on the inner wall of the pressure relief pipeline one, and a plurality of groups of connecting holes are arranged on the baffle in a ring-shaped manner.

[0019] As a preferred solution of the present invention, an extrusion ring 1 is installed on the inner wall of the pressure relief pipeline 1, a blocking block is arranged in the pressure relief pipeline 1, and the top of the blocking block is fitted with the baffle, an extrusion ring 2 is sleeved and fixed on the blocking block, a spring 2 is sleeved on the blocking block, and the spring 2 is fitted with the extrusion ring 1 and the extrusion ring 2, and the matching structure of the blocking block and the spring 2 is arranged in the pressure relief pipeline 2, the pressure relief pipeline 3 and the pressure relief pipeline 4.

[0020] In the above technical solution, compared with the prior art, the technical effects and advantages provided by the present invention are as follows:

[0021] By controlling the valve core tube to move left and right in the two groups of docking chambers and cavities, the valve core tube is staggered with the pressure relief pipeline one, pressure relief pipeline two, pressure relief pipeline three and pressure relief pipeline four and the liquid outlet pipeline one and the liquid outlet pipeline two through the two symmetrical groups of liquid outlet holes one and two at the bottom. Therefore, when the liquid outlet pipeline one and the liquid outlet pipeline two independently output hydraulic oil, it is ensured that there are two pressure relief paths to avoid pressure increase and damage to internal parts. The sealing cylinder is squeezed by the left and right movement of the valve core tube to make the hydraulic oil flow into the threaded groove, thereby lubricating and maintaining the valve core tube. In this way, different pressure control when the hydraulic oil is switched can be met, and adaptive pressure relief and lubrication and maintenance of the internal parts as a whole can be performed, thereby increasing the service life of the internal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the layout structure of the second liquid outlet pipeline of the present invention;

[0025] Figure 3 It is a schematic diagram of the valve seat planing structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the lubrication pipeline layout structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the connection structure of the second pressure relief pipeline and the second liquid outlet pipeline of the present invention;

[0028] Figure 6 It is a schematic diagram of the planing structure of the valve core tube of the present invention;

[0029] Figure 7 It is a schematic diagram of the sealing cylinder structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the liquid inlet tank of the present invention;

[0031] Fig. 9 It is a schematic diagram of the layout structure of the liquid outlet hole 1 and the liquid outlet hole 2 of the present invention;

[0032] Fig.10 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0033] Fig.11 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0034] Fig.12 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0035] Fig.13 For the present invention Figure 6 The enlarged structural diagram at D in the middle;

[0036] Fig.14 For the present invention Figure 6 The enlarged structural diagram at E in the middle;

[0037] Fig.15 For the present invention Figure 4 Enlarged structural diagram at F in the middle.

[0038] Description of reference numerals:

[0039] 001, valve seat; 101, servo driver; 102, servo controller; 002, control assembly; 201, liquid inlet pipeline; 202, liquid outlet pipeline 1; 203, liquid outlet pipeline 2; 204, cavity; 205, butt joint pipe; 206, valve core pipe; 207, liquid inlet groove; 208, limit groove; 209, liquid outlet hole 1; 210, liquid outlet hole 2; 003, drive assembly; 301, butt joint cavity; 302, control cavity; 303, internal threaded cylinder; 304, bevel gear 1; 305, bevel gear 2; 306, screw; 004, lubrication group Parts; 401, delivery pipeline; 402, nut; 403, liquid storage chamber; 404, lubrication pipeline; 405, connecting chamber; 406, sealing cylinder; 407, through hole; 408, limit ring; 409, spring one; 410, threaded groove; 005, pressure relief assembly; 501, pressure relief pipeline one; 502, pressure relief pipeline two; 503, pressure relief pipeline three; 504, pressure relief pipeline four; 505, inner tapered ring; 506, baffle; 507, connecting hole; 508, extrusion ring one; 509, blocking block; 510, extrusion ring two; 511, spring two. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] The present invention provides Figure 1-15 The electro-hydraulic controlled reversing valve for mining shown in the figure comprises a valve seat 001, a plurality of servo drivers 101 are installed above the valve seat 001, a servo controller 102 is installed on one side of each servo driver 101, and the servo controller 102 is used for linear connection with the control system;

[0042] The servo driver 101 can be used to control the internal parts of the valve seat 001 to perform precise rotation control, and the servo controller 102 can perform timely adjustment of the control through the background system data.

[0043] The regulating component 002 disposed in the valve seat 001 includes a cavity 204, a liquid inlet pipeline 201 is opened above the inner wall of the cavity 204, a liquid outlet pipeline 1 202 is opened below the inner wall of the cavity 204, and a liquid outlet pipeline 203 is opened below the inner wall of the cavity 204, and the liquid outlet pipeline 203 is symmetrically arranged with the liquid outlet pipeline 1 202;

[0044] The hydraulic oil is delivered to the valve seat 001 through the liquid inlet pipeline 201, and the hydraulic oil is delivered separately through the liquid outlet pipeline 1 202 and the liquid outlet pipeline 2 203, thereby achieving the steering control effect of the hydraulic oil.

[0045] The driving assembly 003 disposed in the valve seat 001 includes a docking cavity 301, and the docking cavity 301 is symmetrically opened on the inner wall of the cavity 204;

[0046] The lubrication assembly 004 disposed in the valve seat 001 includes a delivery pipeline 401, the delivery pipeline 401 is opened on one side of the valve seat 001, and a nut 402 is screwed at the opening of the delivery pipeline 401;

[0047] By loosening the nut 402 , lubricating oil can enter the inside of the delivery pipeline 401 , thereby lubricating the parts inside the valve seat 001 .

[0048] The pressure relief assembly 005 disposed in the valve seat 001 includes a pressure relief pipeline 1 501 . The pressure relief pipeline 1 501 is opened below the inner wall of the cavity 204 , and the pressure relief pipeline 1 501 is connected to the inside of the liquid outlet pipeline 2 203 .

[0049] Through the pressure relief pipeline 1 501, when the oil pressure inside the liquid outlet pipeline 203 is relatively high, the pressure relief pipeline 1 501 can divert and transport the hydraulic oil, thereby relieving the oil pressure.

[0050] Furthermore, in the above structure, the regulating component 002 also includes a docking tube 205, which is installed at the through connection between the liquid inlet pipeline 201 and the cavity 204. A valve core tube 206 is connected in the cavity 204, and a liquid inlet groove 207 is provided above the valve core tube 206. A limiting groove 208 is provided on the inner wall of the liquid inlet groove 207, and the interior of the limiting groove 208 is slidably connected to the lower edge of the docking tube 205.

[0051] The hydraulic oil transported in the liquid inlet pipeline 201 can be transported to the valve core tube 206 through the butt joint 205, and the valve core tube 206 is restricted by the butt joint 205 to prevent the valve core tube 206 from rotating in the cavity 204 and causing misalignment.

[0052] Furthermore, in the above structure, a liquid outlet hole 209 is opened at the bottom of the valve core tube 206, a liquid outlet hole 210 is opened at the bottom of the valve core tube 206, and the liquid outlet hole 210 is located on one side of the liquid outlet hole 209, and the aperture of the liquid outlet hole 1 209 is larger than the aperture of the liquid outlet hole 210, and the combination of the liquid outlet hole 1 209 and the liquid outlet hole 210 is symmetrically arranged in two groups at the bottom of the valve core tube 206, and the part of the valve core tube 206 located inside the two groups of docking cavities 301 is opened with a threaded groove 410.

[0053] The hydraulic oil inside the valve core tube 206 can be transported to the inside of the liquid outlet pipeline 1 202 and the liquid outlet pipeline 2 203 through the liquid outlet hole 1 209 and the liquid outlet hole 2 210, and the different liquid outlet holes 1 209 and the liquid outlet holes 2 210 and the liquid outlet pipeline 1 202 and the liquid outlet pipeline 2 203 are coordinated to achieve the effect of controlling the hydraulic oil delivery efficiency.

[0054] Furthermore, in the above structure, the lubrication component 004 also includes a liquid storage chamber 403, which is opened inside the valve seat 001, and the liquid storage chamber 403 is connected to the delivery pipeline 401, and lubrication pipelines 404 are symmetrically opened below the liquid storage chamber 403, and connecting chambers 405 are opened at the upper edges of the inner walls of the two groups of docking chambers 301, and the connecting chambers 405 are connected to the corresponding lubrication pipelines 404.

[0055] The lubricating oil delivered by the delivery pipeline 401 can be stored through the liquid storage chamber 403 and can be continuously delivered downward along the lubricating pipeline 404 .

[0056] Furthermore, in the above structure, a retaining ring 411 is installed inside the connecting cavity 405, a sealing cylinder 406 is connected through the connecting cavity 405, and the sealing cylinder 406 is fitted with the lower part of the connecting cavity 405, a plurality of through holes 407 are arranged in a ring-shaped pattern on the inner wall of the sealing cylinder 406, a limiting ring 408 is sleeved on the sealing cylinder 406, a spring 409 is sleeved on the sealing cylinder 406, and the upper and lower sides of the spring 409 are respectively fitted with the limiting ring 408 and the retaining ring 411.

[0057] By fitting the sealing cylinder 406 and the connecting cavity 405, the flow of lubricating oil delivered from the lubrication pipeline 404 to the connecting cavity 405 can be limited. The spring 1 409 cooperates with the limiting ring 408 and the retaining ring 411 to make the sealing cylinder 406 fit firmly with the bottom of the connecting cavity 405, thereby ensuring the sealing between the connecting cavity 405 and the docking cavity 301.

[0058] Furthermore, in the above structure, the drive component 003 also includes a control chamber 302, which is opened on the inner wall of a group of docking chambers 301, and an internal threaded tube 303 is rotatably connected to the inner wall of the control chamber 302, a screw 306 is threaded in the internal threaded tube 303, and the screw 306 is fixedly connected to one side of the valve core tube 206, a bevel gear 1 304 is sleeved and fixed on the internal threaded tube 303, a bevel gear 2 305 is meshed with one side of the bevel gear 1 304, and the bevel gear 2 305 is axially connected to the output end of the servo driver 101.

[0059] The servo driver 101 can be used to mobilize the bevel gear 2 305 to rotate, so that the bevel gear 2 305 drives the bevel gear 1 304 to rotate, and drives the internal threaded tube 303 to rotate and cooperate with the screw 306 to drive the valve core tube 206 to slide along the cavity 204, and when the valve core tube 206 moves in the working state, its two ends will not contact the sealing tube 406 when moving in the docking cavity 301. When maintenance is required, the two ends of the valve core tube 206 can contact the sealing tube 406, thereby squeezing the sealing tube 406, so that the lubricating oil inside the connecting cavity 405 flows out and flows into the thread groove 410, and the surface of the valve core tube 206 is lubricated and maintained as the valve core tube 206 runs subsequently.

[0060] Furthermore, in the above structure, the pressure relief component 005 also includes a second pressure relief line 502, which is opened below the inner wall of the cavity 204, and the second pressure relief line 502 is connected to the inside of the second liquid outlet line 203, and the second pressure relief line 502 is located on the side close to the opposite liquid outlet hole 1 209, a third pressure relief line 503 is opened below the inner wall of the cavity 204, and the third pressure relief line 503 is connected to the first liquid outlet line 202, and the third pressure relief line 503 and the second pressure relief line 502 are symmetrically arranged, and a fourth pressure relief line 504 is opened below the inner wall of the cavity 204, and the fourth pressure relief line 504 is symmetrically arranged with the first pressure relief line 501.

[0061] The valve core tube 206 drives the liquid outlet hole 1 209 and the liquid outlet hole 210 to move, so that the liquid outlet hole 210 on one side and the liquid outlet pipeline 2 203 are connected, and the liquid outlet hole 1 209 and the pressure relief pipeline 2 502 on the other side cooperate. At this time, hydraulic oil is transported through the liquid outlet hole 210. When the movement continues, the liquid outlet hole 210 and the pressure relief pipeline 1 501 are connected, and the liquid outlet hole 1 209 and the liquid outlet pipeline 2 203 are connected, so that the liquid outlet hole 1 209 on the other side is fitted and sealed with the cavity 204, and the liquid outlet hole 210 on the other side is connected with the pressure relief pipeline 2 502, and when the valve core tube 206 is driven in the reverse direction, the liquid outlet hole 1 209 and the liquid outlet hole 210 on the opposite side can produce this kind of cooperation with the liquid outlet pipeline 1 202, thereby realizing the reversing control of the hydraulic oil.

[0062] Furthermore, in the above structure, an inner conical ring 505 is installed on the inner wall of the pressure relief pipeline 1 501, and the opening direction of the inner conical ring 505 is toward the inside of the pressure relief pipeline 1 501, and the inner conical ring 505 is arranged in the pressure relief pipeline 2 502, the pressure relief pipeline 3 503 and the pressure relief pipeline 4 504. A baffle 506 is installed on the inner wall of the pressure relief pipeline 1 501, and a plurality of groups of connecting holes 507 are arranged in a ring shape on the baffle 506.

[0063] The inner conical ring 505 can prevent a large amount of hydraulic oil from entering the pressure relief line 1 501 and the pressure relief line 2 502 when the hydraulic oil is output, thereby affecting the output power of the hydraulic oil.

[0064] Furthermore, in the above structure, an extrusion ring 508 is installed on the inner wall of the pressure relief pipeline 501, a blocking block 509 is arranged in the pressure relief pipeline 501, and the top of the blocking block 509 is fitted with the baffle 506, an extrusion ring 510 is sleeved and fixed on the blocking block 509, a spring 511 is sleeved on the blocking block 509, and the spring 511 is fitted with the extrusion ring 508 and the extrusion ring 510, and the matching structure of the blocking block 509 and the spring 2 511 is arranged in the pressure relief pipeline 2 502, the pressure relief pipeline 3 503 and the pressure relief pipeline 4 504.

[0065] By cooperating with the blocking block 509 and the spring 2 511, the position of the blocking block 509 is maintained, so that the inside of the pressure relief line 1 501 and the pressure relief line 2 502 are sealed. However, when the hydraulic oil pressure is relatively high, the pressure will push the blocking block 509 open, so that the spring 2 511 is squeezed, and the pressure relief line 1 501 and the pressure relief line 2 502 are connected, so that the hydraulic oil can flow along the pressure relief line 1 501 and the pressure relief line 2 502 into the interior of the liquid outlet line 1 202, thereby achieving the pressure relief effect of the hydraulic oil.

[0066] like Figure 1-15As shown, the servo controller 102 controls the servo driver 101 to drive the bevel gear 2 305 to rotate and drive the bevel gear 1 304 to rotate, so that the internal threaded tube 303 drives the screw 306 to move, and at this time the valve core tube 206 slides along the cavity 204, so that the two groups of liquid outlet holes 1 209 and liquid outlet holes 210 are respectively connected and matched with each other in the pressure relief pipeline 1 501, the pressure relief pipeline 2 502, the pressure relief pipeline 3 503 and the pressure relief pipeline 4 504, so that the liquid outlet pipeline 1 202 or the liquid outlet pipeline 2 20 3 to output the hydraulic oil, thereby realizing the reversing output control of the hydraulic oil, and during maintenance, the rotation restriction of the internal threaded cylinder 303 is released, so that the two ends of the valve core tube 206 can contact and squeeze the sealing cylinder 406, so that the lubricating oil in the connecting cavity 405 flows into the threaded groove 410, thereby lubricating and maintaining the valve core tube 206, and when the second outlet hole 210 on one side and the second outlet pipeline 203 are connected and matched, the aperture of the second outlet hole 210 is smaller, thereby meeting the control of the smaller hydraulic oil pressure, and at the same time The liquid outlet hole 209 on the opposite side is connected with the pressure relief pipeline 502. If the hydraulic oil pressure fluctuates, the pressure relief pipeline 502 and the opposite liquid outlet hole 209 can act as pressure relief holes. When the liquid outlet hole 209 is connected with the liquid outlet pipeline 203, the liquid outlet hole 210 will cooperate with the pressure relief pipeline 501, and the liquid outlet hole 209 on the opposite side is sealed with the inner wall of the cavity 204. At the same time, the liquid outlet hole 210 on the opposite side is connected with the pressure relief pipeline 502. At this time, the hydraulic oil controls the dynamic The force belongs to the maximum control. At this time, both the pressure relief line 1 501 and the pressure relief line 2 502 can be used for pressure relief. The left and right driving of the valve core tube 206 can meet the different pressure control when the hydraulic oil is switched, and adaptive pressure relief can be performed to avoid damage to internal parts due to high pressure. By utilizing the power of the left and right driving of the valve core tube 206, the sealing tube 406 can be squeezed to make the lubricating fluid flow into the threaded groove 410, thereby lubricating and maintaining the valve core tube 206 as a whole, thereby increasing its service life.

[0067] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mining electro-hydraulic controlled directional valve, comprising a valve seat (001), characterized in that: A plurality of servo drivers (101) are installed above the valve seat (001), a servo controller (102) is installed on one side of each servo driver (101), and the servo controller (102) is used to be linearly connected to a control system; The regulating component (002) disposed in the valve seat (001) comprises a cavity (204), a liquid inlet pipeline (201) is provided above the inner wall of the cavity (204), a liquid outlet pipeline 1 (202) is provided below the inner wall of the cavity (204), and a liquid outlet pipeline 2 (203) is provided below the inner wall of the cavity (204), and the liquid outlet pipeline 2 (203) is symmetrically arranged with the liquid outlet pipeline 1 (202); The driving assembly (003) disposed in the valve seat (001) comprises a docking cavity (301), wherein the docking cavity (301) is symmetrically opened on the inner wall of the cavity (204); The lubrication assembly (004) disposed in the valve seat (001) comprises a delivery pipeline (401), wherein the delivery pipeline (401) is opened on one side of the valve seat (001), and a nut (402) is threadedly connected to the opening of the delivery pipeline (401); The pressure relief assembly (005) disposed in the valve seat (001) comprises a pressure relief pipeline 1 (501), wherein the pressure relief pipeline 1 (501) is opened below the inner wall of the cavity (204), and the pressure relief pipeline 1 (501) is connected to the inside of the liquid outlet pipeline 2 (203); The lubrication assembly (004) further comprises a liquid storage cavity (403), wherein the liquid storage cavity (403) is provided inside the valve seat (001), and the liquid storage cavity (403) is connected to the delivery pipeline (401), lubrication pipelines (404) are symmetrically provided below the liquid storage cavity (403), a connecting cavity (405) is provided at the upper edge of the inner wall of the docking cavity (301), and the connecting cavity (405) is connected to the corresponding lubrication pipeline (404), and two groups of connecting cavities (405) are installed inside A retaining ring (411), a sealing cylinder (406) is connected through the connecting cavity (405), and the sealing cylinder (406) is fitted with the lower part of the connecting cavity (405), a plurality of through holes (407) are arranged in an annular pattern on the inner wall of the sealing cylinder (406), a limiting ring (408) is sleeved on the sealing cylinder (406), a spring 1 (409) is sleeved on the sealing cylinder (406), and the upper and lower sides of the spring 1 (409) are respectively fitted with the limiting ring (408) and the retaining ring (411); The drive assembly (003) further comprises a control chamber (302), wherein the control chamber (302) is provided on the inner wall of a group of docking chambers (301), an internal threaded barrel (303) is rotatably connected to the inner wall of the control chamber (302), a screw rod (306) is threadedly connected to the inner wall of the internal threaded barrel (303), and the screw rod (306) is fixedly connected to one side of the valve core tube (206), a bevel gear 1 (304) is sleeved and fixedly connected to the internal threaded barrel (303), a bevel gear 2 (305) is meshed on one side of the bevel gear 1 (304), and the bevel gear 2 (305) is axially connected to the output end of the servo driver (101).

2. The electro-hydraulic controlled directional valve for mining according to claim 1, characterized in that: The regulating component (002) further comprises a butt joint (205), wherein the butt joint (205) is installed at the through connection between the liquid inlet pipeline (201) and the cavity (204), wherein a valve core tube (206) is through-connected in the cavity (204), wherein a liquid inlet groove (207) is provided above the valve core tube (206), wherein a limit groove (208) is provided on the inner wall of the liquid inlet groove (207), and wherein the interior of the limit groove (208) is slidably connected to the lower edge of the butt joint (205).

3. The electro-hydraulic controlled directional valve for mining according to claim 2, characterized in that: The bottom of the valve core tube (206) is provided with a first liquid outlet hole (209), the bottom of the valve core tube (206) is provided with a second liquid outlet hole (210), and the second liquid outlet hole (210) is located on one side of the first liquid outlet hole (209), and the aperture of the first liquid outlet hole (209) is larger than the aperture of the second liquid outlet hole (210), and the combination of the first liquid outlet hole (209) and the second liquid outlet hole (210) is symmetrically arranged in two groups at the bottom of the valve core tube (206), and the portion of the valve core tube (206) located inside the two groups of docking cavities (301) is provided with a threaded groove (410).

4. The electro-hydraulic controlled reversing valve for mining according to claim 1, characterized in that: The pressure relief component (005) further comprises a second pressure relief pipeline (502), wherein the second pressure relief pipeline (502) is provided below the inner wall of the cavity (204), and the second pressure relief pipeline (502) is connected to the inside of the second liquid outlet pipeline (203), and the second pressure relief pipeline (502) is located on the side close to the opposite liquid outlet hole (209), a third pressure relief pipeline (503) is provided below the inner wall of the cavity (204), and the third pressure relief pipeline (503) is connected to the first liquid outlet pipeline (202), and the third pressure relief pipeline (503) is symmetrically arranged with the second pressure relief pipeline (502), and a fourth pressure relief pipeline (504) is provided below the inner wall of the cavity (204), and the fourth pressure relief pipeline (504) is symmetrically arranged with the first pressure relief pipeline (501).

5. The electro-hydraulic controlled reversing valve for mining according to claim 4, characterized in that: An inner conical ring (505) is installed on the inner wall of the pressure relief pipeline one (501), and the opening direction of the inner conical ring (505) faces the inside of the pressure relief pipeline one (501), and the inner conical ring (505) is arranged in the pressure relief pipeline two (502), the pressure relief pipeline three (503) and the pressure relief pipeline four (504). A baffle (506) is installed on the inner wall of the pressure relief pipeline one (501), and a plurality of groups of connecting holes (507) are arranged in an annular shape on the baffle (506).

6. The electro-hydraulic controlled directional valve for mining according to claim 5, characterized in that: An extrusion ring 1 (508) is installed on the inner wall of the pressure relief pipeline 1 (501), a blocking block (509) is arranged in the pressure relief pipeline 1 (501), and the upper part of the blocking block (509) is fitted with the baffle (506), an extrusion ring 2 (510) is sleeved and fixed on the blocking block (509), a spring 2 (511) is sleeved on the blocking block (509), and the spring 2 (511) is fitted with the extrusion ring 1 (508) and the extrusion ring 2 (510), and the matching structure of the blocking block (509) and the spring 2 (511) is arranged in the pressure relief pipeline 2 (502), the pressure relief pipeline 3 (503) and the pressure relief pipeline 4 (504).

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